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I-74
B-070343_EN • B
A
dditionAl
i
nformAtion
for
the
i
nstAller
Error
code
Fault description
Explanation
Action(s)
331
Sensor input BX2 without
function
Connect temperature sensor in BX termi-
nal
332
Sensor input BX3 without
function
Connect temperature sensor in BX termi-
nal
333
Sensor input BX4 without
function
Connect temperature sensor in BX termi-
nal
335
Sensor input BX21 without
function
Connect temperature sensor in BX termi-
nal
336
Sensor input BX22 without
function
Connect temperature sensor in BX termi-
nal
341
Sensor B6 missing
Solar sensor missing
Check parameters, connection and com-
ponent.
349
Buffer storage tank return
valve Y15 missing
Check connection of return valve Y15.
Replace as required.
350
Buffer storage tank address
error
Correct device address.
351
Primary controller/ system
pump, address error
Correct device address.
352
Pressureless header, ad-
dress error
Correct device address.
353
Sensor B10 missing
Common flow sensor missing
Check parameters, connection and com-
ponent
371
Flow temperature heating
circuit 3
Check the circuit for fault insulation and
heat losses.
372
Temperature limiter heating
circuit 3
Allow the circuit to cool down and carry
out reset; if the fault occurs several times
inform AIC technical support.
378
Internal repetition
Contact AIC technical support
382
Repetition speed
Contact AIC technical support
384
Extraneous light
Shut off gas supply and contact AIC
technical support
385
Mains undervoltage
Check electric supply in boiler terminals
386
Fan speed tolerance
Check air supply
388
DHW sensor no function
Check connection and sensor. Replace
as required.
391
Room controller 1
Check addresses and parameters
392
Room controller 2
393
Room controller 3
426
Feedback flue gas damper
Check the connection and component
427
Configuration flue gas
damper
Check configuration parameters
429
Dynamic water pressure
too high
Expansion tank is defective
Verify pump
Replace expansion tank
430
Dynamic water pressure
too low
Verify pump